84428407 has 16 divisors (see below), whose sum is σ = 100096000. Its totient is φ = 69685920.

The previous prime is 84428401. The next prime is 84428441. The reversal of 84428407 is 70482448.

It is a cyclic number.

It is not a de Polignac number, because 84428407 - 2¹¹ = 84426359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84428401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48844 + ... + 50542.

It is an arithmetic number, because the mean of its divisors is an integer number (6256000).

Almost surely, 2^84428407 is an apocalyptic number.

84428407 is a deficient number, since it is larger than the sum of its proper divisors (15667593).

84428407 is a wasteful number, since it uses less digits than its factorization.

84428407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 84428407 is about 9188.4931844128. The cubic root of 84428407 is about 438.6951822596.

The spelling of 84428407 in words is "eighty-four million, four hundred twenty-eight thousand, four hundred seven".